In the Absence of Evidence from Fossils, Systematists Frequently Use

question 82

Multiple Choice

In the absence of evidence from fossils, systematists frequently use a technique called ____ to identify ancestral and derived character states.

• A) outgroup comparison
• B) ingroup analysis
• C) gel electrophoresis
• D) microarray analysis
• E) homology comparison

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Definitions:

Neuron

A cell of the nervous system that is specialized to transmit information throughout the body.

Resting Pause

A brief period of rest or inactivity, especially used in the context of physical exercise or mental relaxation.

Sodium/Potassium Pumps

Cellular mechanisms that move sodium and potassium ions across the cell membrane to maintain appropriate concentration levels inside and outside the cell.

Action Potential

A rapid, temporary reversal in the electrical polarization of the membrane of a nerve cell or muscle cell, enabling the transmission of signals.